package net.springmvc13_14.interceptor;

import net.springmvc13_14.entity.Stu;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Objects;

public class MyInterceptor1 implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Stu user = (Stu) request.getSession().getAttribute("stu");
        System.out.println(user);
        if (Objects.nonNull(user)) {
            return true;
        } else {
            request.getRequestDispatcher("/pages/login.jsp").forward(request,
                    response);
            return true;
        }
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("postHandle 第一个");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("afterCompletion 第一个");
    }
}
